<!--
{
  "availability" : [
    "iOS: 16.4.0 -",
    "iPadOS: 16.4.0 -",
    "macCatalyst: 16.4.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "StoreKitTest",
  "identifier" : "/documentation/StoreKitTest/SKAdTestPostback/postbackSequenceIndex",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "StoreKit Test"
    ],
    "preciseIdentifier" : "c:objc(cs)SKAdTestPostback(py)postbackSequenceIndex"
  },
  "title" : "postbackSequenceIndex"
}
-->

# postbackSequenceIndex

The position of this postback among all postbacks for an ad impression.

```
var postbackSequenceIndex: Int { get }
```

## Discussion

For more information about receiving time-delayed postbacks for an ad impression, see <doc://com.apple.documentation/documentation/StoreKit/receiving-postbacks-in-multiple-conversion-windows>.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)